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What are the conditions in which two lines are parallel

Posted by Shekhar Tiwari 8 years, 6 months ago

CBSE > Class 09 > Mathematics

1 answers

Amar Kumar 8 years, 6 months ago

Conditions of Parallelism:
Two lines in a plane are said to be parallel if they do not intersect, when extended infinitely in both the direction.
The distance between the two lines is the same throughout.

If two straight lines are cut by a transversal, and if
• the pair of corresponding angles is equal, then the two straight lines are parallel to each other.
• the pair of alternate angles is equal, then the two straight lines are parallel to each other.
• the pair of interior angles on the same side of transversal is supplementary, then the two straight lines are parallel.

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